Victor hugo mathusitek



(No Model.)

V. H. MATHUSHEK.- METALLIC FRAME FOB PIANOFORTES.

No. 556,273. Patented Mar. 10, 1896.

OOOOOOOOAYQOOOOOOO 0700000000000 OOOOO INVENTOR: We E0 rfizyo Ma us/z 21B /i x ATTORNEYS.

UNITED STATES PATENT OFFICE.

VICTOR IIUGO MATIIUSIIEK, OF NEIV YORK, N. Y.

METALLIC FRAME FOR PIANOFORTES.

SPECIFICATION forming part of Letters Patent No. 556,273, dated March10, 1896.

Application filed July 18, 1895. Serial No- 556/ll6. (No model.)

To all whom it may concern.-

Be it known that I, VICTOR HUGO MATHU- sHEK, a citizen of the UnitedStates, residing at New York, in the county and State of New York,haveinvented new and useful Improvements in Metallic Frames for Pianofortes,of which the following is a specification.

This invention relates to certain improvements in the construction ofiron frames for pianofortes, whereby the metallic agraffes are preventedfrom coming in direct contact with any portion of the iron frame.

The peculiar and novel construction of my iron frame is pointed out inthe following specification and claim and illustrated in theaccompanying drawings, in which- Figure 1 represents a plan or top viewof an iron frame constructed according to my invention. Fig. 2 is alongitudinal vertical section in the plane 00 as, Fig. 1. Fig. 3 is atransverse section of that portion or bar of the iron frame whichsupports the agraffes. Fig. 4 is an enlarged view of an agraffe such asI use in connection with the iron frame. Fig. 5 is a face view of theagraffe in its progress of manufacture. Fig. 6 is a section in the plane1 y, Fig. 5.

In the drawings the letter A designates an iron frame such as is used ingrand pianos; but my invention is applicable to iron frames for alldescriptions of pianofortes.

F designates the bar which forms a portion of the iron frame A and inwhich are secured other suitable non metallic material, Fig. 3. Theagraffes B are provided with screwshanks c, Fig. 4, which can be screwedinto the non=metallic plugs 19.

In order to retain the plugs 19 in their seats and to make it absolutelysure that the agraffes shall not come in metallic contact with the barF, I provide said bar with a recess d, into which is placed a strip 6 ofwood or other suitable non-metallic material, Fig. 3.

The agraffes which I use by preference are made from blanks formed asshown in Figs. 5 and 6. These blanks consist of ashank c and a flatportion f. Into this fiat portion I drill three (more or less) holes g,which are countersunk from opposite sides as shown in Fig. 6, and thenthat part of the flat portion 6 beneath the line 2 2, Fig. 5, is cutaway, thus forming the agraffe B shown in Fig. 4. Of course any othersuitable method of manufacturing the agraffes can be employed.

WVhat I claim as new, and desire to secure by Letters Patent, i s- Ametallic frame for pianofortes provided with a bar F having cavities aand a recess d, non-metallic plugs I) inserted into the cavities a, anon-metallic strip 6 inserted into the recess d and metallic agraifessecured in the non-metallic plugs 17 and bearing upon the non-=metallicstrip e substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

VICTOR HUGO MATIIUSHEK.

\Vitnesses WM. 0. I-IAUEE, E. F. KASTENHUBER.

